Struct TaskMonitor 

pub struct TaskMonitor { /* private fields */ }

A monitor for spawning and monitoring background tasks.

The TaskMonitor allows you to spawn background tasks that are automatically monitored for panics, errors, and unexpected termination. In such cases, a BackgroundTaskFailure is sent through a broadcast channel that subscribers can listen to.

Example

use matrix_sdk_common::task_monitor::TaskMonitor;

let monitor = TaskMonitor::new();

// Subscribe to failures
let mut failures = monitor.subscribe();

// Spawn a task that runs indefinitely
let _handle = monitor.spawn_background_task("worker", async {
    loop {
        // Do work...
        matrix_sdk_common::sleep::sleep(std::time::Duration::from_secs(1))
            .await;
    }
});

Implementations

impl TaskMonitor

pub fn new() -> Self

Create a new task monitor.

pub fn subscribe(&self) -> Receiver<BackgroundTaskFailure>

Subscribe to failure notifications.

Returns a broadcast receiver that will receive BackgroundTaskFailure messages whenever a monitored task fails.

Note: If the receiver falls behind, older messages may be dropped.

pub fn spawn_background_task<F>( &self, name: impl Into<String>, future: F, ) -> BackgroundTaskHandle

where F: Future<Output = ()> + SendOutsideWasm + 'static,

Spawn a background task that is expected to run indefinitely.

If the task completes (whether successfully or by panicking), it will be reported as a BackgroundTaskFailure report through the broadcast channel.

Use this for long-running tasks like event loops, sync tasks, or background workers that should never complete under normal operation.

Arguments

• name - A human-readable name for the task (for debugging purposes).
• future - The async task to run.

Returns

A BackgroundTaskHandle that can be used to abort the task or check if it has finished. This is the equivalent of tokio’s JoinHandle.

pub fn spawn_fallible_task<F, E>( &self, name: impl Into<String>, future: F, ) -> BackgroundTaskHandle

where F: Future<Output = Result<(), E>> + SendOutsideWasm + 'static, E: Error + SendOutsideWasm + 'static,

Spawn a background task that returns a Result.

The task is monitored for panics and errors; see also BackgroundTaskFailure.

If the task returns Ok(()), it is considered successful and no failure is reported.

Arguments

• name - A human-readable name for the task (for debugging purposes).
• future - The async task to run.

Returns

A BackgroundTaskHandle that can be used to abort the task or check if it has finished. This is the equivalent of tokio’s JoinHandle.

Trait Implementations

impl Debug for TaskMonitor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for TaskMonitor

fn default() -> Self

Returns the “default value” for a type.